Improvement in furnaces tor steam-generators



wait-r11 gisten .stent dtiiiiitr.

Letters Patent N 94,793, dated September 14, 1869.

IMPROVEMENT IN FURNACES FOR STEAM-GENERATORS.

The Schedule referred to in these Letters Patent and makingpart of the same.

To all whom it may concern Be it known that we, MATTHEW TILDESLEY, of Willenhall, in the county of Staii'ord, and Kingdom of England, and AMES BIRD, of the' same place, have invented .new and useful Improvements in the Coustruction ot' FurnacesyStoves, and Fire-Places; and we do hereby declare that the tbllowing is a full, clear, and exact description thereof', which will enablethose, skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part ot' this specification.

This invention has for its object the construction of furnaces, stoves, midline-places generally, in such manner that thc air may come in contact with the fire, and a draught may be created upon all sides of the fire, at the back end. and at tbebottorn or under the fire, the top alone being closed, by which construction we obtain smoke-consuming fires.

In order that our invention may be more fully comprehended, we shall now proceed to describe the same in detail, by aid of the drawings hereunto attached, and the letters and iignres marked thereon.

Referring to sheet l- Figure l is a front elevation of a furnace constructed in accordance with our improvements, which Wehave shown, for the sake of illustration, as applied to 'the heating of a steam-boilerg 1 Figure 2 is a transverse section, taken upon the line v A A of the plan, and looking into the beating-chamber; Figure 3, sheet 2, is a side elevation of the furnace; Figure 4 represents the parts in sectional plan; and Figurev 5, sheet 3, is a longitudinal section, upon the line B B einge.

Similar letters of reference indicate' corresponding parts.

We provide thev front 'of the. furnace or tire-place with ordinary sloping-bars, a, which extend from Vthe front toward the back, with sutiicient incline, for instance, at the angle shown at a', fig. 5.

These bars d may be either parallel vwith each other or formed tapering; that is, with larger 'space or openings between them at their bottom ends; or the bars may be made to run longitudinally from side to sido.

The bars a are supported Ior held in position upon cross-bearers or axes o, which are carried by suitable iron castings b, and supports or standards 'b'.

d are the side gratings or lateral fire-bars, which may be formed solid with the castings b, or may be attached thereto as desired.

In ether case, we secure the forward ends of the castings into the supports or standards b', and build in with the brick-work of the furnace the other ends of V .side gratings d or castings b, as indicated iu dotted The lateral fire-bars al are shown in the drawings as being exactly vertical, but they may be formed so as to slant from front to back4 or to any desired angle, or from bottom to'top, or from top to bottom. e is the back plate or back-erid vertical set of bars, being held within grooves or recesses in the side gratings at`c', with a clear space behind it from the under side, for'the free admission of' air to the fire at thatpart, and, if necessary, this back set of vbars may have a sliding action up and down within the grooves or recesses e', so as tobe opened or closed for enabling the clinker or cinder to be readily removed from the bottom of the grate.

Such openingand closing motion may be given to the back grate or set oi' bars e, from the action of a crank-arin and lever-handle,- f, or by any other suitaole means.

g isthe bottom setof bars, grate, or grid, which may be capable of being opened for the removal of cinder, or clinker, by means of a forward or sideways sliding action of suoli grate or grid upon flanges or within grooves, and it may also have a rocking or shaking motion, by means of a crank and leveiarin, h, and this motion we purpose usingwith the front sloping bars, by forming a connection between the bearers or axes c, by means of a crank i and crank-ar1ns t" i, which are secnr'ed on the square ends of the bearers c, so Athat the motion of the lever-handle h will vimpart a siinnl` taneous rocking motion to the front bars a and bottom bars g.

Tothis motion we lay no claim, and use it merely for the purpose of aidingl the passage or descent of the fuel to the fire.

Above thelback set of bars or grate e is formed the bridge k,-and above this bridge is an arched opening or mouth, as usually employed, through which the flame passes into the heating-chamber;' and in order to obtain a reverbeiatory transverse of the llame, we sometimes form a second arch, ld, so that the flame will travel in the direction of the arrows, iig. 5, this second arch insuring the combustion of any trifling smoke which may have escaped' over 4the' bridge ls.

The top of the furnace or lire-place is furnished with a fire-brick arch, l, spanning the width, and supported by the brick-work jambs Z,which are built upon the castf ings b and side-grates d, or the fire-brick arch Z mayv be built upon the flanges of the side gratings d and castings b, without tliebrick-'work .jambs l?.

m is an opening or feeding-space for the passage of the fuel, and this space we 'keep always sealed or packed' with the fuel, so that no air can possibly play upon the fire at this part.

The lire-brick arch lis shown h1 the dIaWDgS as adapted to the shape ofthe boiler.

For-other furnaces or fire-places, the outline of such arch will be somewhat varied, and in applying our invention to a cornice or ue-boiler, we pi opose inserting about half of the length of the furnace orcradle-fbrm of the Lire-grate into the flue of the boiler, allowing sufiicient space around the sides from the outside for the free admission of air to the iire at such parts;

n is 2Lre-guard or slide, provided with balanceweight-s and chains n',

vThe remaining portions of the drawings are ordinary mechanical details, of which further mention is unnecessary.

, Instead of the arrangement already specified, we propose, in some cases, to make onr'furnaces or other vfire-grates of a taper form in plan, widening toward the bottom 'or toward the top, which form may be- V'either round, oval, square," oblong, or polygonal-sided.

This form we secure ina slanting position, from front [toward the back, the one-half or segment of the bottom being furnished with anv open-draught grat-e, `and the fue] being fed into the fire from the top, as before specified, or, in some instances, a modified form of our furnace or grate may be formed with one solid cheek or side and one open one, for the admission of air, which arrangement may be desirabie in certaincOnditions; or, by another arrangement, we form the fire-grate or bottom bars in a V-form, sloping fromv the side in- Ward, as well asfrom front toward the back of the furnace. l

Furnaces constructed as herein. described will burn slack, small coal, or other descriptions of fuel, and the main object of onr invention is to provide a furnaceor fire-place which shall have a draught brought to bear upon one or' both sides and the-back end of the fire, as well as at its bottom or under side, no air being admitted above the fuel, thus creating 'an intense heat toward the bridge, which will be sulcient at the pointof combustion to consume all smoke `which usually passes through into the stack oriue, the combustion produced in the beating-chamber being a brilliant and clear gas-fire, free from smoke and smell in most cases.

Having thus described the nature and object of our said invention, and the manner'in which the same may be carried into effect, we wish it understood that we do not intend to limit oulselves to the precise details herein described and illustrated; nor do we claim any of the mechanical parts apart from the general arrangeor combination ofthewhole; but

What we do claim as new,'and desire to secure by 1, 'lhe combination and arrangement of the castings b and standards, b', with the inclined'front and Witnesses:

EDWARD J onN PAYNE, WM. TADMAN FoULKEs. 

